/Engine/Source/Runtime/Slate/Public/Framework/Docking/TabManager.h
Adds a legacy tab type to the tab type redirection map so tabs loaded with this type will be automatically converted to the new type
void AddLegacyTabType ( [FName](API\Runtime\Core\UObject\FName) InLegacyTabType, [FName](API\Runtime\Core\UObject\FName) InNewTabType )